Struct Step 

#[non_exhaustive]
pub struct Step {

    pub id: String,
    pub step_index: u32,
    pub step_type: StepType,
    pub source: StepSource,
    pub target: StepTarget,
    pub status: StepStatus,
    pub content: String,
    pub content_delta: String,
    pub thinking: String,
    pub thinking_delta: String,
    pub tool_calls: Vec<ToolCallInfo>,
    pub error: String,
    pub is_complete_response: Option<bool>,
    pub structured_output: Option<Value>,
    pub usage_metadata: Option<UsageMetadata>,
}

A single step in the agent trajectory, mirroring the SDK’s Step.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

id: String

Unique string identifier for the step.

step_index: u32

Integer index of the step in the trajectory.

step_type: StepType

The high-level type of the step.

source: StepSource

The source that generated the step.

target: StepTarget

The target of the step interaction.

status: StepStatus

The status of the step.

content: String

The text content/output of the step.

content_delta: String

Incremental text content added since the last update for this step.

thinking: String

Full model reasoning/thinking text for planner responses.

thinking_delta: String

Incremental thinking text added since the last update for this step.

tool_calls: Vec<ToolCallInfo>

List of tool calls associated with the step.

error: String

Short error message if the step failed.

is_complete_response: Option<bool>

Whether this step is a completed model response directed at the user.

Multiple steps per turn may have this flag set; consumers wanting only the last response should iterate fully.

structured_output: Option<Value>

Structured output payload extracted from the FINISH step.

This is serde_json::Value because it contains user-defined schema data whose shape is not known at compile time.

usage_metadata: Option<UsageMetadata>

Token usage for this step’s model invocation.

Trait Implementations

impl Clone for Step

fn clone(&self) -> Step

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Step

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Step

fn default() -> Step

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for Step

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Step

impl<'py> FromPyObject<'py> for Step

fn extract_bound(ob: &Bound<'py, PyAny>) -> PyResult<Self>

Extracts Self from the bound smart pointer obj.

impl PartialEq for Step

fn eq(&self, other: &Step) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for Step

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for Step